Jaguar Repair: 1973 jaguar xke v12 guages & tach, jaguar xke v12, fuse panel

Question
The first time in 25 years of ownership I have a new problem--ALL gauges & the tachometer are not working.  Is there a common link or fuse that would cause these all to fail?
Thanks for your help, Harley  

Answer
Hi Harley,
I don't have a diagram for that car but have worked on them in the past and as I remember they powered the instruments off of a voltage stabilizer mounted either on the back of the speedo or tach. The gauges work off of 10 volts not 12v. The tach however was powered by 12v but if you lost power to the stabilizer, it may have lost power to the tach also. I believe they were green wires on the fuse panel.
Howard